The "AC-P" version of the Derivative Oscillator is my personal customized version of Constance Brown's Derivative Oscillator (using Everget's implementation of it as the base), with the the following modifications and additions:
VWAP Indication - option to show whether the price input option is above or below the Daily VWAP (red triangles = price input is...
This indicator was originally developed by Constance (Connie) M. Brown (Journal of Technical Analysis (Winter-Spring 1994, 45-61): "Derivative Oscillator: A New Approach to an Old Problem").